Consider the reaction for the decomposition of hydrogen disulfide: 2H2S(g)2H2(g)+S2(g) Kc=1.67107 at 800C A 0.500L reaction vessel initially contains 0.200 mol of H2S and 6.25102mol of H2 at 800C. Find the equilibrium concentration of [S2]. Express your answer to three significant figures and include the appropriate units